A device for packaging products in a foil package includes a feeder for continuously supplying a foil web from a supply roll to a corner forming unit. The corner forming unit includes a curved deforming edge for deforming the flat foil web to a curved foil web having a reduced width, a deformer for forming a profile in the curved foil web, a roller for flattening the foil web, with the reduced width of the foil web at least substantially being maintained and overlapping sections being formed at the location of the profile, and a sealer for sealing the overlapping sections. The deforming edge and the deformer form part of an exchangeable unit. The sealer is movable along at least one guide, with the corner forming unit comprising aligning elements associated with the sealer, which aligning elements cooperate with further aligning elements associated with the deformer for correctly positioning the sealer relative to the deformer.